Ua kapa ʻia ke kala i uhi ʻia i ka pā, ka pā kila, ua hoʻokumu ʻia ia ma luna o ka coil metala (paʻa i ʻōwili ʻia, ka pā wela wela, ka pā alumini, ke kiʻekiʻe o ka alumini paʻa, ke kila kila, a me nā mea ʻē aʻe) e like me ke kumu kumu, ma ka ka uhi ʻana a i ʻole ka laminating i nā ʻano like ʻole o ka uhi ʻana a i ʻole ke kiʻiʻoniʻoni plastik.No ka mea ua hoʻopau ʻia i loko o ka hale hana metallurgical coating coil, hiki ke hana pololei ʻia e nā mea hoʻohana i nā huahana, no laila i ʻike ʻia he coil pre-coated.